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HILLSIDE FOUNDATION |
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Hillside foundations present a special case or approach for each unique property since the nature of the terrain varies from location to location.
In the City of Los Angeles, the pre-construction process for hillside foundation projects will require a GPI (Grading Pre-Inspection) by the Grading Department. A set of preliminary construction plans will need to be prepared for this inspection request. The City Grading Department Inspector will then generate a “Grading Pre-Inspection Report” listing special requirements to be carried out throughout the construction process. This report will dictate if a “soils report” will be necessary or if a grading permit must be issued. It indicates if your project will need special drainage, soil testing and the submission of a compaction report. If required, these items can significantly increase the cost of the foundation work. |
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A Structural Engineer will design the foundation according to accepted standards specific to the tested soil of the particular property. Many times a hillside foundation design will incorporate grade beams and deep pile footings embedded into the bedrock layer beneath the structure or along the hillside as friction piles.
Sinai Construction, Inc. offers expediting services to alleviate the property owner of the burden of coordinating all of the necessary construction documentation gathered from various specialized professionals.
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Grade Beams. A grade beam is a continuous reinforced concrete beam that distributes the load to bearing points such as pile caps or caissons or to transfer the load to the ground. When used as continuous interior floor supports, grade beams provide strong support with respect to seismic movement.
Caissons or Piles. A pile is used to carry or transfer the load of a structure to the bedrock below the ground surface. Whenever possible drilling is done utilizing heavy machinery with an auger attachment. However, sometimes circumstances require that they be hand dug. For a typical caisson, a round hole is dug or bored into bedrock. A steel cage of reinforcing bars is then constructed and placed into the hole. And, following inspections by the soil engineer, the structural engineer and the building inspectors, concrete is poured into the caisson around the steel reinforcing cage. -
Soldier Piles. Sometimes, before a permanent foundation or retaining wall can be constructed, it is necessary to place temporary shoring into the steeper slopes. Temporary piles, such as soldier piles, are typically constructed by driving steel “H” beams that are vertically pounded into the soil with pile drivers. Alternatively, round steel tubes are similarly driven and may or may not be reinforced with concrete.
Our field operators are current with state of the art equipment usage and the most efficient excavating and grading techniques. We offer excavation and foundation trenching, backfilling and compaction. As foundation specialists we work closely with soils and geotechnical engineers and are always attentive to soils conditions.
Whether hand dug, drilled or driven, Sinai Construction is qualified and certified to perform deep foundation work. We are a full service contractor and can facilitate your project from concept to completion.
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